fix(48520): fix getting parameter type by index (#48521)

Author: a-tarasyuk

src/services/codefixes/fixAddMissingMember.ts

@@ -169,7 +169,7 @@ namespace ts.codefix {
             const param = signature.parameters[argIndex].valueDeclaration;
             if (!(param && isParameter(param) && isIdentifier(param.name))) return undefined;
 
-            const properties = arrayFrom(checker.getUnmatchedProperties(checker.getTypeAtLocation(parent), checker.getTypeAtLocation(param), /* requireOptionalProperties */ false, /* matchDiscriminantProperties */ false));
+            const properties = arrayFrom(checker.getUnmatchedProperties(checker.getTypeAtLocation(parent), checker.getParameterType(signature, argIndex), /* requireOptionalProperties */ false, /* matchDiscriminantProperties */ false));
             if (!length(properties)) return undefined;
             return { kind: InfoKind.ObjectLiteral, token: param.name, properties, parentDeclaration: parent };
         }

tests/cases/fourslash/codeFixAddMissingProperties20.ts

@@ -0,0 +1,14 @@
+/// <reference path='fourslash.ts' />
+
+////type T = { foo: number };
+////const foo: T[] = [];
+////[|foo.push({  })|]
+
+verify.codeFix({
+    index: 0,
+    description: ts.Diagnostics.Add_missing_properties.message,
+    newRangeContent:
+`foo.push({
+    foo: 0
+})`,
+});